This is a map I have been working on, on and off, for about the past year and a half. It's not great, but then I am not a great builder, so life just rolls that way.
To install, just download the .zip file, extract it, and place it in your .minecraft/saves/ folder. Once you've done that, simply launch the game and enter the world.
It's a fairly short map, and there is only a slight ending, but I hope you enjoy it regardless.
One other thing I should note is that this map will ONLY work with version 1.12 through 1.12.2, and 1.12.2 is the only version tested by me.
Thank you!